ANSWER: Both John D. Rockefeller and Andrew Carnegie were wealthy American businessmen and were also philanthropists.
EXPLANATION: John D. Rockefeller and Andrew Carnegie were wealthy businessmen of America. While John D. Rockefeller was into Oil industry, Andrew Carnegie was into Steel industry. Both of them were also famous philanthropists of America. Rockefeller was known for his charities which was mainly church related. later, he also started making charities for poor and distressed people. Carnegie on the other hand, was dedicated to education. He opened Carnegie Library, Carnegie Institute for Science, Carnegie Mellon University etc.